Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: ACM Research Inc., 3 years.
ACM Research Inc.
Director
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
ACM Research Inc. June 10, 202697.7%
-
ACM Research Inc. June 12, 202597.6%
-
ACM Research Inc. June 13, 202496.6%
-
ACM Research Inc. June 15, 202399.5%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 18, 2026 | ACM Research Inc. | Option exercise | +5,000 | $5.60 | $28,000 |
| Aug 18, 2026 | ACM Research Inc. | Open-market sale | −1,200 | $80.29 | $96,348 |
| Aug 18, 2026 | ACM Research Inc. | Open-market sale | −3,400 | $81.31 | $276,454 |
| Aug 18, 2026 | ACM Research Inc. | Open-market sale | −400 | $82.17 | $32,868 |
| May 19, 2026 | ACM Research Inc. | Option exercise | +5,000 | $5.60 | $28,000 |
| May 19, 2026 | ACM Research Inc. | Open-market sale | −1,333 | $63.84 | $85,099 |
| May 19, 2026 | ACM Research Inc. | Open-market sale | −500 | $65.09 | $32,545 |
| May 19, 2026 | ACM Research Inc. | Open-market sale | −1,309 | $67.21 | $87,978 |
| May 19, 2026 | ACM Research Inc. | Open-market sale | −1,858 | $67.54 | $125,489 |
| Mar 9, 2026 | ACM Research Inc. | Option exercise | +5,000 | $5.60 | $28,000 |
| Mar 9, 2026 | ACM Research Inc. | Open-market sale | −4,100 | $43.37 | $177,817 |
| Mar 9, 2026 | ACM Research Inc. | Open-market sale | −900 | $43.94 | $39,546 |
| Nov 12, 2025 | ACM Research Inc. | Gift | −755,090 | — | — |
| Mar 14, 2025 | ACM Research Inc. | Open-market sale | −2,456 | $28.32 | $69,554 |
| Mar 14, 2025 | ACM Research Inc. | Open-market sale | −7,062 | $29.23 | $206,422 |
Questions about Haiping Dun
What boards is Haiping Dun on?
Haiping Dun sits on the board of ACM Research Inc.
How long has Haiping Dun served on boards?
Our records show at least 4 years of board service across 1 board, the earliest from 2023.
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